Vehicle seat back



FIG. 1 is a front, top and left side perspective view of a vehicle seat back showing our new design;

FIG. 2 is a rear, top and left side perspective view of a vehicle seat back showing our new design

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged cross sectional view taken along line 9-9 in FIG. 3 thereof;

FIG. 10 is an enlarged cross sectional view taken along line 10-10 in FIG. 5 thereof; and,

FIG. 11 is an enlarged cross sectional view taken along line 11-11 in FIG. 5. 

CLAIM We Claim the ornamental design for a vehicle seat back, as shown and described. 